Oil-burner



W. H. BUNCH.

OIL BURNER. APPLICATION FILED IMIS. I9I-9.

Patented Feb. 24, 1920.

INvENToR al'eia.u2u

BY M ya? ATTORNEYS UNITED sTATEs PATENT oEEIoE.

WALTER R. BUNCH, F RIVERSIDE, CALIFORNIA, ASSIGNOR OF THREE-FOURTHS T0 EMIL IB. DREYFUS, 0F SAN FRANCISCO, CALIFORNIA. I

OIL-BURNER.

Specioation of Letters IPatent.

Patented Feb. 24, 1920.

To all whom z't may concern:

Be it known that I, WALTER R. BUNCH, a citizen of the UnitedStates, residing at Riverside, in the county of Riverside and State of California, have invented new andl useful Improvements in Oil-Burners, of which the following is a specification.

This invention relates to oil burners, and particularly to oil burners of the rotary type in which atomization of the oil is obtained by centrifugal action.

One 0f the objects of the present invention is to provide a simple, substantial, easl lily-operated oil burner which is so constructed that the fuel delivered to the burner will be atomized by centrifugal action and then projected and further atomized by means of an air blast. Another object of the invention is to provide a novel .form of rotor for centrifugally atomizing the oil and in conjunction 'therewith a fan for transmitting rotary movement thereto.l

Another object of the invention is to provide means for regulating the volume of air admitted, said means also adapted to direct the air so that a thorough. atomization and mixture of oil and air is obtained `before combustion takes place. Further objects `will hereinafter appear.

l The invention consists of the Iparts and the construction, "combination and arrangement 0f parts as hereinafter more fully described and claimed, having reference to the accompanying drawings in which- 36 Figure 1 is a central vertical section of the burner.

Fig. 2 is a plan View of the same on the line 2-2 of Fig. 1.

Referring t0 `the drawings in detail, A indicates abowl-shaped casing, in the lower portion of which is formed a central air inlet opening 2. Formed integral with the casing is an elbow member through which the air is admitted, said elbow vbeing. connected with any suitable source of air suply, as a fan or blower not here shown. lixtending upwardly into the casing and ycentrally positioned with relation to the casting and the inlet opening 2 is a stand- 50 ard 5. This standard is in this instance formed integral with the elbow 3but may be suitably secured thereto, if desired.

Formed interior of the standard is a passage 6 and connected with the lower end of 56 the standard is a pipe 7 which delivers oil thereto from a suitable source of supply not here shown. Adapted to be screwed into the upper end of the standard is a vertical vbearin member 8 in which is formed a centra oil duct 9 which forms a communica- 60 tion or extension of the passage 6.

Turnably mounted on the 'vertical bearing member 8 is a rotary atomizer, which, in this instance, consists of an inverted cup 10 provided with perforations 11 at the upper 65 end. The cup member is provided for the urpose of centrifugally atomizing and projecting the oil delivered'thereto. It is therefore mounted to rotate about the vertical member 8 and oil delivered to the upper end 70 of the cup will therefore project through the radialopenings 11 as will hereinafter be described. For'the purpose of imparting rotary movement to the atomizer a fan 12 has been provided. This fan is secured to the cup in any suitable manner, or, as shown yat 14, it is mounted directly above the air inlet opening 2 as it can readily be seen that an air blast discharging upwardly `through the opening 2 will impart the ro- 80 tary movement required. f

A burner constructed as here shown may be employed for a variety of purposes. It is adapted for installation in practically any standard form of furnace box and may therefore be sup-ported in any suitable manner desired. I have, however, in the present instance shown'bracket members 15 secured at their upper ends to the elbow section 3. These bracket members form feet for the supportJ of the burner casing and the air and oil pipes communica-ting therewith.

In actual practice,withaburner installed, it is only necessary to sta-rt the blower and to turn on` the oil. The oil entering throu h pipe 7 generally under a slight pressure o tained by gravity flow, passes upwardly through the passage G andthe oil yduct 9, then passes through perforations 98L formed in the upper end of the vertical bearing member in direct alinement with the perforations 11. The oil is thus finally centrifugally discharged through these openings as the cup and fan are rotated at a high-speed, due tothe action of the air blast passing upwardly through the casing.

Actual experience has shown that almost perfect combustion and high temperatures ma be obtained with a burner constructed as ere shown. This is due to the fact that i the oil isnfrst centrifugally atomized and is then further atomized by b'eing projected radially into an air blast which is traveling thereto. This air blast when striking the already finely divided oil particles Will not only assist in further atomizing the oil, but it will also combine with the oil particles, thus forming a homogeneous mixture before combustion takes place. y

, One of the important features of the present invention is the provision of a removable circular plate 16. This plate is adapted to be placed in an annular seat 17 formed in the casing directly above the inlet opening 2. The disk, as shown, is provided with a central opening 18 through which the air discharges. This is of great importance as it directs the air against the yfan at a point vwhere the most efficient action may be obtained and it furthermore provides a means for regulating the volume of air admitted. The importance of regulating the volume of air admitted should be obvious, as different furnace installations require greater' or smaller volumes 0f air to support combustion, andy similarly require smaller 0r greater amounts of oil. It is therefore possible to manufacture a standard size burner in the present instance, as it may be adjusted to suit a great variety of installations, thatvis, if a comparatively small fire is required `a disk 16 is inserted in which the opening 18 is so reduced that a comparatively small amount of air will be admitted.

The oil supply is similarly reduced, thereby producin a small fire. Again, if a larger volume o fire and air is required, it is only necessary to increase the oil feed and to insert a disk in which the opening 18 is enlarged. A mixture of air and fuel best suited for the installation may thus be lobtained without resorting to the necessity of varyingthe size of the burner or the several parts employed.

Another important feature of the inventionis the positioning of the standard 5. By referring to Figs. 1 'and 2 it will be seen that `the standard is placed absolutely in a central position with relation to the elbow,

the inlet opening 2 and the disk 1G. Air entering through the elbowA will therefore become equally distributed and will discharge in an even unbroken annular column when passing through the opening 18. The lire projected by the centrifugal atomizer will therefore be even and circular in shape serves, in conjunction with the centrifugal action of the propeller, to spread and equalze the projected flame.

Having thus described my invention, what vI claim vand desire to secure by Letters Patent is:

,1. An' oil burner comprising a circular bowl'liaving a divergent distributing rim, a standard extending vertically into the bottom of the bowl, means to supply an air blast around the standard and into the bottom of the bowl, an oil passage and conduit through the center ofthe standard, radial discharge openings at the top of the conduit, a sleeve cap having discharge openings turnable about the conduit, a propeller mounted upon the cap and revoluble by the air blast, a removable disk-shaped member having a central opening formed therein, and an annular recess formed in the bottom of the bowl for the reception' of the disk.

2. An oil burner including a standard having a central, vertical stem with an axial passage connected at the bottom with an oil supply, an extension with a conduit connecting with the first named stem and having discharge openings at the top, a sleeve journaled and turnable about'the extension havings of the conduit, a propeller fixed to and revoluble with the sleeve, a bowl-shaped receiver, the top of which is substantially above the propeller and level with the conduit .discharge openings, a flaring divergent mixing member extension from the upper edge of the bowl, an air blast conductor surrounding the standard and opening into the bottom of the bowl and acting to revolve the propeller to mix and distribute the oil and air, a. removable disk-shaped member having a central opening formed therein, and an annular recess formed in the lotltom of the bowl for the reception of the In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

WALTER R. BUNCH.

Witnesses L. A. BLICKENSTAFF, H. J. VANIMAN. 

